Device and method thereof for re-aeration of wetlands

Abstract

In one aspect, the present disclosure involves a re-aeration device and re-aeration method for constructed wetland. In one aspect, the re-aeration device comprises a re-aeration pipe and a windmill. The re-aeration pipe has a tubular structure with openings at both ends; one end inserts into the wetland substrate, and the other end connects with the windmill for receiving and accelerating air flow. The re-aeration pipe may also contain several telescoped or parallel arranged pipes with openings at both ends as well as with different pipe diameters and lengths, which connect with the windmill to form the re-aeration device. The present disclosure also provides a method of re-aeration for constructed wetlands by using the above-mentioned device. The re-aeration device provided herein has features of being simple in structure, environment friendly, and low-cost. In one aspect, the re-aeration method is characterized as simple, practicable, energy-efficient, environment friendly, low-cost, widely applicable, and having good effect and high performance on re-aeration.

The invention claimed is: 
     
       1. A re-aeration device for a wetland, comprising:
 a re-aeration pipe, which comprises a tubular structure comprising an opening at both ends, one end being an inserting end for inserting into a substrate of the wetland and transporting air through the re-aeration pipe to the substrate, and the other end being a free end for receiving the air; 
 a windmill comprising a plurality of fan blades configured to rotate and change air flow direction; and 
 an interactional link component between the free end and the windmill for fixing the windmill on the free end of the re-aeration pipe, 
 wherein the link component comprises a holder welded onto the free end of the re-aeration pipes and a vertical shaft connecting the windmill with the holder, and 
 wherein the re-aeration pipe comprises an outermost re-aeration pipe and one or more inner pipes. 
 
     
     
       2. The re-aeration device of  claim 1 , wherein the outermost re-aeration pipe and the one or more inner pipes have different lengths for inserting into the substrate at different depths, such that air entering each pipe is transported to different depths of the wetland substrate. 
     
     
       3. The re-aeration device of  claim 1 , wherein the one or more inner pipes are arranged in parallel. 
     
     
       4. The re-aeration device of  claim 1 , wherein the outermost re-aeration pipe and the one or more inner pipes are coaxially telescoped and space is provided between the adjacently telescoped pipes for air flow. 
     
     
       5. The re-aeration device of  claim 4 , wherein the lengths of the inner pipes increase successively from the outermost inner pipe to the innermost inner pipe. 
     
     
       6. The re-aeration device of  claim 4 , wherein the re-aeration pipe is manufactured by a unibody process. 
     
     
       7. The re-aeration device of  claim 1 , wherein one end of each inner pipe is a free end, and the other end of each inner pipe is an inserting end. 
     
     
       8. The re-aeration device of  claim 7 , wherein the outermost re-aeration pipe and the one or more inner pipes have different lengths for inserting into the substrate at different depths, such that air entering each pipe is transported to different depths of the wetland substrate. 
     
     
       9. The re-aeration device of  claim 7 , wherein the one or more inner pipes are arranged in parallel, or the outermost re-aeration pipe and the one or more inner pipes are coaxially telescoped and space is provided between the adjacently telescoped pipes for air flow. 
     
     
       10. The re-aeration device of  claim 9 , wherein the lengths of the inner pipes increase successively from the outermost inner pipe to the innermost inner pipe. 
     
     
       11. The re-aeration device of  claim 9 , wherein the re-aeration pipe is manufactured by a unibody process. 
     
     
       12. The re-aeration device of  claim 1 , wherein the device comprises a plurality of windmills. 
     
     
       13. A re-aeration method for a constructed wetland, comprising inserting the inserting end of the re-aeration pipe of the re-aeration device of  claim 1  into the substrate of a wetland.